公开(公告)号：US20210064151A1

公开(公告)日：2021-03-04

申请号：US16558336

申请日：2019-09-03

Applicant: PixArt Imaging Inc.

Inventor： BOON-HOW KOK ,  KEEN-HUN LEONG ,  Ching Geak CHAN

IPC: G06F3/03 ,  G06T1/00 ,  G06T1/20 ,  G06T1/60

Abstract: An optical detecting device with a tracking function includes an image acquiring module and a processor. The image acquiring module is grouped into a first cluster and a second cluster of pixels. The first cluster and the second cluster are arranged adjacent to each other, and used to respectively acquire a first imaging result and a second imaging result both containing an indicating mark. The processor is electrically connected to the image acquiring module and adapted to track a proceeding direction of the indicating mark by computing difference between the first imaging result and the second imaging result. The optical detecting device further includes a memory module electrically connected to the processor, and the processor analyzes the computed difference via a lookup table stored inside the memory module to determine the proceeding direction.

公开(公告)号：US20190138832A1

公开(公告)日：2019-05-09

申请号：US16238230

申请日：2019-01-02

Applicant: PixArt Imaging Inc.

Inventor： BOON-HOW KOK ,  KEEN-HUN LEONG ,  CHING-GEAK CHAN ,  CHIANG-HEE LIM ,  CHU-LEIK HO ,  HSIN-CHIA CHEN ,  YEN-MIN CHANG

IPC: G06K9/20 ,  G06K9/00 ,  G06F3/03 ,  H04N19/00 ,  G01D5/34 ,  G06K9/46

Abstract: The present disclosure is related to an optical encoder which is configured to provide precise coding reference data by feature recognition technology. To apply the present disclosure, it is not necessary to provide particular dense patterns on a working surface. The precise coding reference data can be generated by detecting surface features of the working surface.

公开(公告)号：US20230386050A1

公开(公告)日：2023-11-30

申请号：US18223021

申请日：2023-07-17

Applicant: PixArt Imaging Inc.

Inventor： KEEN-HUN LEONG ,  BOON-HOW KOK ,  DENNIS DOMINIC DONALD

IPC: G06T7/20 ,  B60W30/00 ,  B62D15/02 ,  G01C25/00 ,  G01C22/00 ,  H04N23/90 ,  G06F3/0362

CPC classification number: G06T7/20 ,  B60W30/00 ,  B62D15/024 ,  G01C25/00 ,  G01C22/00 ,  H04N23/90 ,  G06F3/0362 ,  G01C21/26

Abstract: An optical sensor system for determining trajectory of a wheel includes: a wheel mounted in a wheel arch having an outer surface covered with evenly-spaced wheel treads; an optical sensor mounted in the wheel arch but not touching the wheel, for performing a plurality of counts corresponding to respectively capturing a plurality of images of the wheel according to the wheel treads, and comparing the captured images with a reference image to determine a 2D displacement. The optical sensor further performs a calculation to convert the measured 2D displacement of the wheel from its original position into a distance the wheel travels along a path in order to determine the wheel trajectory.

公开(公告)号：US20190026903A1

公开(公告)日：2019-01-24

申请号：US16140444

申请日：2018-09-24

Applicant: PixArt Imaging Inc.

Inventor： KEEN-HUN LEONG ,  BOON-HOW KOK ,  DENNIS DOMINIC DONALD

IPC: G06T7/20 ,  G06F3/0362 ,  B60W30/00 ,  B62D15/02

Abstract: An optical sensor system for determining trajectory of a car, the optical sensor system being mounted in a wheel arch of the car, includes: a plurality of optical sensors mounted in the wheel arch above a wheel, the optical sensors being located behind a plurality of clear casings that do not touch the wheel, for performing a plurality of counts corresponding to respectively capturing a plurality of images of the wheel according to an outer surface of the wheel evenly covered with wheel treads. The captured images are compared with a reference image to determine a 2D displacement of the wheel from its original position. This measured 2D displacement is converted into a distance the wheel travels along a path, and the wheel trajectory is determined by calculating a turning degree of the wheel according to a trigonometric manipulation of the captured 2D displacement.